| 发明名称 |
METHOD FOR PRODUCING POLYLACTIC ACID-BASED AIR-THROUGH NONWOVEN FABRIC, AND POLYLACTIC ACID-BASED AIR-THROUGH NONWOVEN FA |
| 摘要 |
The invention provides a method of producing an air-through nonwoven fabric comprising the steps of: forming a web comprising composite fibers comprising a first polylactic acid and a second polylactic acid having a lower melting point than the melting point of the first polylactic acid; a step of exposing the web to a first air-through treatment in the temperature range of the following temperature T1: glass transition temperature of second polylactic acid<T1<melting point of second polylactic acid; and a step of exposing the web that has been exposed to the first air-through treatment, to a second air-through treatment in the temperature range of the following temperature T2: melting point of second polylactic acid−5° C.≰T2≰melting point of second polylactic acid+15° C., to produce an air-through nonwoven fabric, wherein the degree of crystallinity of the air-through nonwoven fabric is in the range of 44% to 68%.
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| 申请公布号 |
US2012329352(A1) |
申请公布日期 |
2012.12.27 |
| 申请号 |
US201113582533 |
申请日期 |
2011.02.09 |
| 申请人 |
YOSHIDA MASAKI;MIZUTANI SATOSHI;KONISHI TAKAYOSHI;NOZUMI HIROKO;UNICHARM CORPORATION |
发明人 |
YOSHIDA MASAKI;MIZUTANI SATOSHI;KONISHI TAKAYOSHI;NOZUMI HIROKO |
| 分类号 |
B29C35/06;B32B5/16;D04H1/541;D04H1/55;D04H13/00 |
主分类号 |
B29C35/06 |
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